Siemens 3 series

3 series

Manufacturer	Pyrotronics Siemens {"label": "Manufacturer", "field": "Pyrotronics Siemens"}
Rated Voltage	18-24 VDC (ionization) 16-27 VDC (photoelectric) {"label": "Rated Voltage", "field": "18-24 VDC (ionization) 16-27 VDC (photoelectric)"}
Preceded by	Siemens 4 series Siemens 6 series {"label": "Preceded by", "field": "Siemens 4 series Siemens 6 series"}
Succeeded by	Siemens 11 series {"label": "Succeeded by", "field": "Siemens 11 series"}

{
    "rows": [],
    "title": "3 series",
    "images": []
}

The Siemens 3 series is a series of conventional detectors originally introduced by Pyrotronics.

Models

Ionization smoke detectors

Model	Special feature	Replaced	Replaced by
DI-3	None
DI-3IS	Intrinsically safe
DI-3H	High altitude
DI-A3	High air velocity
DI-A3H	High altitude High air velocity
DI-B3	Duct use only
DI-B3H	Duct use only High altitude

Photoelectric smoke detectors

Model	Heat sensor?	Replaced	Replaced by
PE-3	No
PE-3T	Yes

Heat detectors

Model	Replaced	Replaced by
DT-3P-135

Mounting bases

Model	Type	Replaced	Replaced by
DB-3S	Low profile
ADB-3	Audible
AD-3I	Duct housing
AD-3ILP	Duct housing
SA-3I	Duct housing
SA-3P	Duct housing

Rebrands

Faraday

After Pyrotronics acquired Faraday, Faraday started rebranding 3 series devices as part of the 8900 series.